Works like a charm!
At 10.8.x and cause a lot of problems,most with audio for me,after some months go back to xbmc 11 (eden).
But now with 10.9 start xbmc 11 to have problems like 12.x etc
I nstalled yesrteday night the version of Memphiz recommended for 10.9 and has no problem.
Tested 1080p,720p,sd and audio with dts,,dd5.1,arc.2.0 & 5.1 and mp3.
No problems at all and with official skin of xbmc.
With other skins i had problems!

our servers are still influenced (read xbmc.org) leading that there are no nightly builds uploaded atm. Just be a bit mor patient while we are moving stuff to a new server - in a couple of days the nightlies should be up and running again and then there will be a 64bit version of this aswell.